Zobrazeno 1 - 10
of 462
pro vyhledávání: '"MATSUMOTO, TOMOAKI"'
Autor:
Sadanari, Kenji Eric, Omukai, Kazuyuki, Sugimura, Kazuyuki, Matsumoto, Tomoaki, Tomida, Kengo
Recent cosmological hydrodynamic simulations have suggested that the first stars in the universe often form as binary or multiple systems. However, previous studies typically overlooked the potential influence of magnetic fields during this process,
Externí odkaz:
http://arxiv.org/abs/2405.15045
Autor:
Tokuda, Kazuki, Harada, Naoto, Omura, Mitsuki, Matsumoto, Tomoaki, Onishi, Toshikazu, Saigo, Kazuya, Shoshi, Ayumu, Nozaki, Shingo, Tachihara, Kengo, Fukaya, Naofumi, Fukui, Yasuo, Inutsuka, Shu-ichiro, Machida, Masahiro N.
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations have revealed an increasing number of compact protostellar disks with radii of less than a few tens of astronomical units and that young Class 0/I objects have an intrinsic size
Externí odkaz:
http://arxiv.org/abs/2403.00305
Autor:
Matsumoto, Tomoaki
The formation of binary stars is highly influenced by magnetic fields, which play a crucial role in transporting angular momentum. We conducted three-dimensional numerical simulations of binary star accretion via a circumbinary disk, taking into acco
Externí odkaz:
http://arxiv.org/abs/2402.03212
The drag force experienced by astronomical objects moving through gaseous media (gas dynamical friction) plays a crucial role in their orbital evolution. Ostriker (1999) derived a formula for gas dynamical friction by linear analysis, and its validit
Externí odkaz:
http://arxiv.org/abs/2401.13032
Publikováno v:
ApJ, 959, 17 (2023)
We study the formation of Pop III stars by performing radiation hydrodynamics simulations for three different initial clouds extracted from cosmological hydrodynamics simulations. Starting from the cloud collapse stage, we follow the growth of protos
Externí odkaz:
http://arxiv.org/abs/2307.15108
Autor:
Lee, Jeong-Eun, Matsumoto, Tomoaki, Kim, Hyun-Jeong, Lee, Seokho, Harsono, Daniel, Bae, Jaehan, Evans II, Neal J., Inutsuka, Shu-ichiro, Choi, Minho, Tatematsu, Ken'ichi, Lee, Jae-Joon, Jaffe, Dan
Most stars form in multiple star systems. For a better understanding of their formation processes, it is important to resolve the individual protostellar components and the surrounding envelope and disk material at the earliest possible formation epo
Externí odkaz:
http://arxiv.org/abs/2306.06572
Autor:
Sadanari, Kenji Eric, Omukai, Kazuyuki, Sugimura, Kazuyuki, Matsumoto, Tomoaki, Tomida, Kengo
In the present-day universe, magnetic fields play such essential roles in star formation as angular momentum transport and outflow driving, which control circumstellar disc formation/fragmentation and also the star formation efficiency. While only a
Externí odkaz:
http://arxiv.org/abs/2212.08075
Autor:
Shimoikura, Tomomi, Dobashi, Kazuhito, Hirano, Naomi, Nakamura, Fumitaka, Hirota, Tomoya, Matsumoto, Tomoaki, Taniguchi, Kotomi, Shimajiri, Yoshito
Publikováno v:
The Astrophysical Journal, 2022
We report results of observations of the GGD12-15 region, where cluster formation is actively taking place, using various molecular emission lines. The C18O (J= 1-0) emission line reveals a massive clump in the region with a mass of ~2800 Mo distribu
Externí odkaz:
http://arxiv.org/abs/2202.12492
Magnetohydrodynamic effect on first star formation: prestellar core collapse and protostar formation
Autor:
Sadanari, Kenji Eric, Omukai, Kazuyuki, Sugimura, Kazuyuki, Matsumoto, Tomoaki, Tomida, Kengo
Recent theoretical studies have suggested that a magnetic field may play a crucial role in the first star formation in the universe. However, the influence of the magnetic field on the first star formation has yet to be understood well. In this study
Externí odkaz:
http://arxiv.org/abs/2105.03430
Publikováno v:
The Astrophysical Journal, Volume 916, Issue 2, id.83, 22 pp., (2021)
Recent observations of molecular clouds show that dense filaments are the sites of present-day star formation. Thus, it is necessary to understand the filament formation process because these filaments provide the initial condition for star formation
Externí odkaz:
http://arxiv.org/abs/2012.02205